<ul><li>Never used a wheel that has been dropped</li><li>Always wear full face protection when grinding</li><li>Always follow OSHA B7.1 standards</li><li>Diameter: 4-Inch</li><li>Arbor: 5/8-Inch</li></ul><br><br>Product Description\n\nAll Shark depressed center wheels are reinforced for long life. Type 27 standard shape wheels are the most popular raised hub wheel for grinding and blending.\n\nFrom the Manufacturer\n\nAll Shark depressed center wheels are reinforced for long life. Type 27 standard shape wheels are the most popular raised hub wheel for grinding and blending.

Shark SDP402-5 4-Inch Depressed Center Wheel, 5-Pack